chapter 14

Madeline Joslyn · 46回閲覧 · 25問 · 1年前

通報

問題一覧

Chromosomes are replicated during the _____ phase

If a cell contains 20 chromosomes during 62, it will have 40 chromosomes during S.

False

The karyotype of a normal human male would show a total of 23 pairs of homologous chromosomes.

False

Which of the following statements regarding the G (first gap) phase of the eukaryotic cell cycle is NOT true?

If environmental conditions are favorable during the G phase, G cyclins are degraded causing the cell to prepare to replicate its DNA.

Homologous chromosomes are identical copies of each other

False

Consider an organism whose diploid karyotype shows it to have a total of 60 chromosomes. How many chromosomes would be contained in the sperm of this organism?

At prometaphase, the sister chromatids are organized into a single row in the center of the cell.

False

Which of the following is NOT a part of the mitotic spindle apparatus in plants?

centrioles

Colchicine is a toxin that binds to tubulin proteins and prevents microtubules from elongating. What effect might this have on dividing cells?

Sister chromatids will not be properly separated into separate daughter cells.

Which of the following statements about sister chromatids is TRUE?

Sister chromatids are exact copies of each other and are formed just prior to cell division.

Place the following events of mitosis in the correct order. I. Sister chromatids align on the metaphase plate. II. The cleavage furrow forms. III. The nuclear membrane breaks up. IV. Sister chromatids begin to condense. V. Sister chromatids separate.

IV, III, I, V. II

The centromere

Is a region of DNA where sister chromatids associate.

The process by which haploid cells are produced from diploid cells is called

meiosis

Mitotic cell division is never used by organisms as a means of reproduction.

false

Why must the life cycle of sexually reproducing species alternate between haploid and diploid stages?

Meiosis must occur at some point in the life cycle to prevent a doubling of chromosomes in each generation.

A cell undergoing meiosis that contains sister chromatids may be either haploid or diploid.

True

At the end of meiosis I

the cells are haploid and the homologous pairs are in separate cells.

For any given species, cells in metaphase II of meiosis would contain 2× more genetic material than cells in metaphase of mitosis.

False

If both synapsis and crossing over of non-homologous chromosomes occurred, what would be the expected result?

A reciprocal translocation

Sexual life cycles include both haploid and diploid stages

True

The life cycle of a sexually reproducing multicellular organism must include which processes?

mitosis, meiosis, and fusion of the gametes.

You prepare the first ever karyotype of an endangered species of frog. Upon examination you find that all the chromosomes are metacentric. This is going to make it difficult to identify

both the pand q arms of the chromosome.

Most human embryos that are aneuploid

are spontaneously aborted in the first trimester.

A plant has a reciprocal translocation between two chromosomes. It is heterozygous for this translocation, i.e., one set of chromosomes is normal, without the translocation. What effect can you be sure that this translocation has on the health and fertility of the plant?

The plant will make some normal gametes (with the full complement of DNA) and some abnormal gametes (without the full complement of DNA).

When a gamete that is lacking a sex chromosome due to nondisjunction has fused with a gamete carrying an X chromosome, this type of abnormality leads to ____

turner syndrome

chapter 21

chapter 21

46回閲覧 • 25問 • 1年前

chapter 22

chapter 22

Chapter 12

Chapter 12

Chapter 13

Chapter 13

chapter 20

chapter 20

chapter 15

chapter 15

chapter 16

chapter 16

chapter 18

chapter 18

Madeline Joslyn · 29問 · 1年前

chapter 1: lecture notes

chapter 1: lecture notes

29問 • 1年前

Madeline Joslyn · 16問 · 1年前

chapter 1: requirements for life slides

chapter 1: requirements for life slides

16問 • 1年前

Madeline Joslyn · 30問 · 1年前

Pearson practice quiz questions

Pearson practice quiz questions

30問 • 1年前

Madeline Joslyn · 22問 · 1年前

chapter 2: chemistry and physiological

chapter 2: chemistry and physiological

22問 • 1年前

Madeline Joslyn · 23問 · 1年前

2.2 Atoms and Elements

2.2 Atoms and Elements

23問 • 1年前

Madeline Joslyn · 20問 · 1年前

Pearson practice test questions

Pearson practice test questions

20問 • 1年前

2.2 continued

2.2 continued

Madeline Joslyn · 35問 · 1年前

2.3 Combining Matter

2.3 Combining Matter

35問 • 1年前

Madeline Joslyn · 21問 · 1年前

2.4 chemical bonds

2.4 chemical bonds

21問 • 1年前

2.6 Inorganic compounds

2.6 Inorganic compounds

Madeline Joslyn · 15問 · 1年前

acids and bases

acids and bases

15問 • 1年前

Madeline Joslyn · 13問 · 1年前

body cavities

body cavities

13問 • 1年前

membranes in the ventral body cavity

membranes in the ventral body cavity

11 Body Systems

11 Body Systems

biomolecules

biomolecules

homeostatic control

homeostatic control

3.1

3.1

Madeline Joslyn · 17問 · 1年前

3.2

3.2

17問 • 1年前

cell junctions

cell junctions

3.3

3.3

3.4

3.4

Madeline Joslyn · 9問 · 1年前

tissues

tissues

9問 • 1年前

4.2

4.2

3.10

3.10

3.12

3.12

Madeline Joslyn · 19問 · 1年前

3.7

3.7

19問 • 1年前

connective tissue fibers

connective tissue fibers

cells in the connective tissue

cells in the connective tissue

classification of epithelia

classification of epithelia

muscle tissue

muscle tissue

nervous tissue

nervous tissue

covering and lining membranes

covering and lining membranes

Madeline Joslyn · 9問 · 1年前

tissue repair

tissue repair

9問 • 1年前

embryonic and fetal development of tissues

embryonic and fetal development of tissues

epithelium

epithelium

granular epithelia

granular epithelia

layers of the skin

layers of the skin

6.1

6.1

basic structure, types, and locations

basic structure, types, and locations

growth of cartilage

growth of cartilage

6.2 functions of bones

6.2 functions of bones

Madeline Joslyn · 21問 · 1年前

classification of bones

classification of bones

21問 • 1年前

6.5 bone development

6.5 bone development

the skeleton

the skeleton

the vertebral column

the vertebral column

7.4 The Pectoral Girdle

7.4 The Pectoral Girdle

7.5

7.5

8.1

8.1

Madeline Joslyn · 16問 · 1年前

legs!

legs!

16問 • 1年前

Madeline Joslyn · 13問 · 1年前

arms

arms

13問 • 1年前

cranium 1

cranium 1

6.3

6.3

Madeline Joslyn · 9問 · 1年前

skull 1

skull 1

9問 • 1年前

homeostatic imbalance - spine

homeostatic imbalance - spine

Madeline Joslyn · 19問 · 1年前

regional vertebral characteristics

regional vertebral characteristics

19問 • 1年前

regional vertebrae thoracic and lumbar

regional vertebrae thoracic and lumbar

7.3 the thoracic cage

7.3 the thoracic cage

gross anatomy

gross anatomy

miscellaneous

miscellaneous

bone markings

bone markings

bones miscellaneous

bones miscellaneous

Madeline Joslyn · 18問 · 1年前

fractures

fractures

18問 • 1年前

Madeline Joslyn · 30問 · 1年前

chapter 9: Pearson quiz

chapter 9: Pearson quiz

30問 • 1年前

muscle actions

muscle actions

muscle actions 2

muscle actions 2

chapter 9: muscular tissues!

chapter 9: muscular tissues!

muscles anterior diagram

muscles anterior diagram

muscles anterior abdomen and arms

muscles anterior abdomen and arms

anterior legs

anterior legs

muscle diagram posterior

muscle diagram posterior

Madeline Joslyn · 30問 · 1年前

chapter 10: Pearson quiz

chapter 10: Pearson quiz

30問 • 1年前

muscular tissue

muscular tissue

muscle miscellaneous

muscle miscellaneous

origins and insertions

origins and insertions

structure of a motor neuron

structure of a motor neuron